Severáček
type: MusicGroup
popularity: 3
followers: 141
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x30f654a7c5394f90094c1a249cc062fa1579ee18cb6cb15f7e66d1159467da51
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954659
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954659
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dcd5f476-f43f-4925-b383-53d2c64ce6c5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dcd5f476-f43f-4925-b383-53d2c64ce6c5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dcd5f476-f43f-4925-b383-53d2c64ce6c5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T06:14:42Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x30f654a7c5394f90094c1a249cc062fa1579ee18cb6cb15f7e66d1159467da51","name":"Severáček","registered_at":"2026-06-21T05:09:47Z","symbol":"NIM1829504","token_address":"0x2f4030d39b90210e674f9cf21821976e8678d06b","type":"artist","uuid":"dcd5f476-f43f-4925-b383-53d2c64ce6c5"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f654a7c5394f90094c1a249cc062fa1579ee18cb6cb15f7e66d1159467da51. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcd5f476-f43f-4925-b383-53d2c64ce6c5.json and https://artists.proofprofile.net/proofs/artist/dcd5f476-f43f-4925-b383-53d2c64ce6c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T06:14:42Z
  text: {"copyright_id":"0x30f654a7c5394f90094c1a249cc062fa1579ee18cb6cb15f7e66d1159467da51","name":"Severáček","registered_at":"2026-06-21T05:09:47Z","symbol":"NIM1829504","token_address":"0x2f4030d39b90210e674f9cf21821976e8678d06b","type":"artist","uuid":"dcd5f476-f43f-4925-b383-53d2c64ce6c5"}
album: Vánoce se Severáčkem
  type: MusicAlbum
  date published: 2000-12-01
album: Úsměvy Severáčku
  type: MusicAlbum
  date published: 2002-09-01
album: Vánoce se Severáčkem 2
  type: MusicAlbum
  date published: 2007-12-01